期刊
TOPICS IN CATALYSIS
卷 60, 期 6-7, 页码 420-430出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-016-0713-9
关键词
Oxide surfaces; Surface defects; Methanol; Magnetite; Surface chemistry
资金
- Austrian Science Fund START [Y 847-N20, P24925-N20]
- Vienna University of Technology
- Austrian Science Fund , doctoral college SOLIDS4FUN [W1243]
- European Research Council (Advanced Grant ''OxideSurfaces'')
- Austrian Science Fund (FWF) within SFB F45 ''FOXSI''
- Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 24925] Funding Source: researchfish
- Austrian Science Fund (FWF) [W1243, P24925] Funding Source: Austrian Science Fund (FWF)
The adsorption of methanol (CH3OH) at the Fe3O4(001)-(root 2 x root 2)R45A degrees surface was studied using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and temperature-programmed desorption (TPD). CH3OH adsorbs exclusively at surface defect sites at room temperature to form hydroxyl groups and methoxy (CH3O) species. Active sites are identified as step edges, iron adatoms, antiphase domain boundaries in the (root 2 x root 2)R45A degrees reconstruction, and above Fe atoms incorporated in the subsurface. In TPD, recombinative desorption is observed around 300 K, and a disproportionation reaction to form methanol and formaldehyde occurs at 470 K.
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